Lock-washer.



A. RICH, Jn.

LOCK WASHER.

APPLICATION FILED FEB. I9, Isn. IIEIIEWED Dic. I1.I9I7.

1,267,695 Patented4 May 28, 1918,

WITNESS:

A TTORNE YS.

UNITED sTATEs ALFBEDJ. RICH, JR., OF SAN FRANCISCO, CALIFGBNIA.

Loox-WASHER.

Specication o f Letters I'atent. Patented May 28, 1918.

Application tiled February 19, 1917, Serial No. 149,385. l Renewed December 17, 1917. l Serial No. 207,621.

To all 'whom t may concern:

Be it known that I, ALFRED J. RICH, J r., a citizen of the United States, residing at the city and county of San Francisco and State of California, have invented certain new and useful Improvements in Lock-Washers, of which the following is a specification. y

IThe present invention relates to improvements in lock washers and has forits principal objects to provide a simple, inexpensive and efcient washer designed for use in connection with bolts subjected to vibration and which is capable of securely locking a nut from accidental rotation thereon, whereby the nut is virtually prevented from being unscrewed by the vibration to which the bolt or nut is subjected. Further objects of the invention are to `provide a washer capable of being made of either light or heavy material and to adapt it for the character of work to which itl is to be applied and one which is capable of use with a nut having a smooth surface or one provided at intervals with shoulders to interlock with it.

The invention consists in theconstruction and novel combination and arrangement of this'invention. l

Fig. 2 1s a view-in elevation ofthe im-A parts hereinafter described, illustrated in the accompanying drawings and pointed out in the claims hereto appended.

In the drawings,

Figure l is a View in side elevation of a..-

lock washer constructed in accordance with proved washer.

Fig. 3 is a side view ofthe washer illustrated in Fig. 2. v

Referring more particularly to the several views of the drawings wherein like characters of reference designate corresponding parts, 1, indicates my improved washer formed preferably .of spring sheet vsteel circular in form and provided with a central opening 2 adaptedyto be arranged on a bolt 3 between a nut 4 and a suitable member or plate 5 and capable of engaging and locking the same from unscrew-ing or rotating due to the jar or vibration to which the belt or plate may be subjected.

The washer is provided on its peripheral e the arcuate` cuts 11. The tongues are arranged'in pairs at opposite sides of the washer with their free ends separated by the solid portion 12 and bent in opposite directions from the opposite sides of the washer. The solid portions 12 are slightlybent or twisted in the stamping of the fingers in a direction approximately parallel 4with the angle of the bend of said ngers as in Fig. 3

. whereby a greater biting action is permitted' of the fingers when engaged between the surfaces, said-twisting also provides additional surfaces or edges 13 and 1-1 disposed in opposite directions for assisting the tongues in restraining the nut from accidental rotation on the bolt. The fingers 6 and 8 and edges 1.3 and 11 of opposite faces of solid'portions 12 and the fingers 'T and 9 and the other edges 13 and 14 of the solid portions 12 respectively, lengage opposite surfaces when a nut is screwed down on to them and the greater the pressure the Hatter the tongues are depressed until their outer surfaces lie` in a plane with the opposite edge of the solid portion 1Q, at which time the limit-ing action of said surfaces or edges 13 or 11 assists that of the tongues. thus, it will be apparent thatl when the nut is screwed down tight the tongues as well as the edges 1 3 and llet prevent the jarring loose of the same.

It is apparent, that' my improved washer may be manufactured at a single stamping, will lock a nut from accidental unscrewing and at the saine time will permit the nut to be removed by a wrench or tool when the necessary power is applied thereto.`

Having ,thus described my invention, what I claim is:

1. A lock washer provided onits outer peripheral edge with a plurality of fingers arranged in pairs at .oppos1te..s1 des thereof, the lingers of each p air extending in a direction toward each Vother with the free ends thereof separated by a solid portion of the washer body and bent to point in opposite directions from opposite sides of the washer body.

2..A lock washer provided on its outer peripheral edgev with a plurality of fingers arranged in pairs at opposite sides thereof. the fingers of each pair extending 1n a direction toward each other with the lfree ends thereof separated b v a solid portion of the washer body and bent to point in opposite drecons from oppusie'sdes 0I" ith@ Wshe' nam@ to this specicaton in the presence of 033', and the' solld'portign of MS Washe" two subscfbng Witnesses.

o v se afanof t e free ent. en of sain 11`11g`e1s,f) eng hecht or twisted to lie in a plane @RED J' RECH JR' approximate y parallel with the angle of the bend of ih@ pair of @Eggers adjacent zheew. Hmm' L TWEE,

In testimony whereo ham signed mfr D. B. RMHABD 

